JPH0442747Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a thermography device that displays the temperature of a cross point while reducing the influence of noise.

``Prior Art'' Generally, in a thermography device, a marker such as a + character is placed at the point where the temperature is to be displayed in a temperature distribution image displayed on a drawing, and the position of the intersection (cross point) of the + character is placed. The temperature is read from the display memory and displayed on the screen.

``Problem that the invention attempts to solve'' However, noise is usually included in the temperature distribution image displayed on the screen, and if there is such noise at the cross point, the actual temperature value will be multiplied. Temperature values that are far apart are displayed.

The present invention aims to solve such problems.

``Means for Solving the Problems'' The thermography device of the present invention scans the object using an optical scanning mechanism, stores the detected temperature information in the image memory, reads it out as appropriate, and displays it on the display device. means for specifying an arbitrary position in the temperature distribution image displayed on the display device; and a means for specifying an arbitrary position in the temperature distribution image displayed on the display device; means for reading temperature information data at a plurality of positions in the image memory from the image memory, means for taking an average value of the plurality of temperature information data read out, and an average value signal from the means for taking the average value and the specified position. The apparatus is further provided with means for sending a signal representing the information to the display means.

"Embodiment of the Invention" FIG. 1 is a schematic diagram of a thermography apparatus showing an embodiment of the invention. In the figure, 1 is the subject, 2
shows the optical scanning mechanism. The optical scanning mechanism includes an infrared focusing lens, horizontal and vertical scanning mirrors,
It consists of a driving device for each of the mirrors, a fixed mirror, an infrared detector, etc., and by mechanically scanning the horizontal and vertical scanning mirrors, the image of the detector is scanned two-dimensionally on the subject. Then, the infrared rays emitted from the surface of the object are sequentially incident on an infrared detector to detect an infrared image (temperature) signal. 3 is an AD converter that converts the temperature signal from the infrared detector into a digital signal; 4 is an AD converter that reads the output of the AD converter according to a command from the control unit (CPU) 5, and converts the temperature information data that has been read into the AD converter; This is an image memory that can be read out. Reference numeral 6 denotes a synchronizing signal generation circuit, which generates scanning signals corresponding to the horizontal and vertical scanning of the optical system scanning mechanism, and outputs the synchronizing signals to the scanning circuit in accordance with the timing of reading data from the image memory 4 according to a command from the CPU 5. Send to 7.
8 is a key operation system, and a display device (e.g. CRT) 9
This is for specifying, for example, the position of a +-shaped marker (the position of the intersection of the markers, that is, the position of the cross point) at any location in the image displayed. Reference numeral 10 denotes an address detection circuit, which detects the address of the cross point position specified by the operating system, and supplies the address of the cross point to the CPU 5 and marker display memory 11. The marker display memory sends the address of the cross point and address signals for the top and bottom, left and right, top and bottom left, and top and bottom right of the crosspoint to the scan circuit 7. Based on the address signal of the cross point, the CPU retrieves the temperature information data at the address of the cross point from the image memory 4 and the addresses surrounding the address of the cross point, for example, as shown in FIG. With respect to the cross point p, upper and lower positions a, b, left and right positions c, d, upper and lower left positions e, f, and upper and lower right positions g,
The temperature information data at the address h is read out from the image memory 4 to the data reading circuit 12. 13
14 is an adder circuit that adds the outputs of the readout circuit;
is an averaging circuit that calculates an average value based on the output of the adding circuit. The output of the averaging circuit is sent to a numerical display memory 15. The numerical display memory 1
The output of 5 is sent to the scan circuit 7.

``Operation'' In such a device, the object 1 is scanned by the optical scanning mechanism 2, and the obtained temperature information signal is
It is stored in the image memory 4 via the AD converter 3.
The temperature information data is continuously output according to the commands of the CPU 5 and sent to the CRT 9 via the scan circuit 7, so that the temperature distribution image of the subject 1 is displayed on the CRT screen. Here, in the temperature distribution image S of the object displayed as shown in FIG.
The user uses the key operation system 8 to specify the address of the location Q for which the temperature is specifically desired. By specifying the address of the operating system, the address detection circuit 10 stores the address value of the specified location in the marker display memory 11.
Send to CPU5. Based on the address signal of the location Q, the CPU retrieves the temperature information data at the address from the image memory 4 and the surrounding addresses of the address, for example, the location p of the location Q, as shown in FIG.
On the other hand, the temperature information data at the addresses of the upper and lower positions a and b, the left and right positions c and d, the upper and lower left positions e and f, and the upper and lower right positions g and h are read out from the image memory 4 to the data reading circuit 12. The read nine temperature information data are added in an adding circuit 13, and then an average value is calculated in an averaging circuit 14, and sent to a scan circuit 7 via a numerical display memory 15.
sent to. The marker display memory 11 is the Q
position address and one position above or below that address,
Signals of left/right, upper/lower left, and upper/lower right addresses are sent to the scan circuit 7. The scan circuit 7 uses the address data of the Q point and its surroundings from the marker display memory 11 to calculate the address data of the Q point and its surroundings among the temperature information data from the image memory 4. It operates to send data excluding certain temperature data to the CRT 9 together with the average value data of each temperature value around point Q from the numerical display memory. Therefore, on the screen of the CRT, point Q is taken as a cross point, and markers M without temperature information are displayed at positions above, below, left and right, above and below the left, and above and below the right of the cross point. Also, the CRT
The average value of the temperature values at the cross point and its surrounding positions is displayed at an appropriate location on the screen.

In the above example, the average value of the temperature values at the position to be measured and the positions around one dot is taken, but any number of positions can be taken to take the average value, and the average value can be taken. The marker for this purpose may have any shape. However, it is desirable to be able to understand the size of the marker from which the average value was taken.

[Effect of the invention] According to the invention, since the average value of the temperature signal values of the point to be measured and points adjacent to the point is measured, the influence of noise can be almost eliminated. Moreover, since the position of the part where the average value was taken is displayed with a marker signal, it is convenient for operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a thermography device shown as an embodiment of the present invention, and FIGS. 2, 3, and 4 are diagrams used to assist in explaining the operation of the device. . 1... Subject, 2... Optical scanning mechanism, 4...
Image memory, 5...Control unit (CPU), 7...Scan circuit, 8...Key operation system, 9...Display device, 10...Address detection circuit, 11...Marker display memory, 12...Data reading Circuit, 13...
... Addition circuit, 14 ... Averaging circuit, 15 ... Numerical display memory.

Claims (1)

[Scope of utility model registration request] In a device configured to scan a subject using an optical scanning mechanism, store detected temperature information in an image memory, read it out as appropriate, and display it on a display device, the temperature distribution image displayed on the display device may include any one of the temperature distribution images displayed on the display device. means for reading temperature information data at a plurality of positions among the specified position and positions adjacent to the specified position from the image memory based on a position signal specified by the position specifying means; A thermography apparatus comprising: means for taking an average value of a plurality of temperature information data; and means for sending an average value signal from the average value taking means and a signal representing the designated position to the display means.